YASKAWA MOTOMAN-PH130F - Disassembly and Reassembly of U-Axis Speed Reducer

7 Disassembly and Reassembly of the Speed Reducers
7.3 Disassembly and Reassembly of U-Axis Speed Reducer
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HW1485471
HW1485471
7.3 Disassembly and Reassembly of U-Axis Speed Reducer
• Refer to fig. 7-3(a) “Disassembly and Reassembly of the U-Axis
Speed Reducer” .
 Disassembly
1. Turn OFF the power supply of the YRC1000.
2. In order to prevent the U-arm unit from falling, support the U-arm unit
by using a chain block, etc., before removing the U-axis motor .
3. Remove the U-axis motor , and then remove the input gear .
(Refer to chapter 6.3 “Disassembly and Reassembly of U-Axis Motor” .)
4. Unscrew the hexagon socket head cap screws , and insert the stud
bolt M12 (length: 40 mm or more) into the tapped hole M12 (2 places)
on the L-arm. Screw the stud bolt into the tapped hole until clearance
of the L-arm is made.
5. Unscrew the hexagon socket head cap screws , and insert the stud
bolt M12 (length: 35 mm or more) into the tapped hole M12 (2 places)
on the speed reducer . Screw the stud bolt into the tapped hole
until the clearance is made between the contact surface of the casing
and the speed reducer .
6. Mount the eyebolts diagonally on the tapped hole M12 (2 places) on
the speed reducer . Remove the speed reducer horizontally by
using the eyebolts. At this time, remove the O-ring .
 Reassembly
1. Mount the O-ring on the speed reducer , and then mount the
speed reducer on the U-arm unit.
2. Tighten the hexagon socket head cap screws with the tightening
torque shown in table 7-3 “U-Axis Speed Reducer Parts Checklist” .
When mounting, be careful that the O-ring does not get caught
between the speed reducer and the U-arm unit.
3. Apply ThreeBond 1206C to the contact surface of the speed reducer
and the L-arm. For the place to apply sealing bond, refer to
fig. 7-3(b) “Surface to Apply Sealing Bond on the U-Axis Speed
Reducer” .
4. For the place to apply sealing bond to the L-arm, refer to fig. 7-3(c)
“Surface to Apply Sealing Bond Between U-axis Speed Reducer and
L-arm” .
Mount the speed reducer and the U-arm unit on the L-arm, and
then tighten the hexagon socket head cap screws with the
tightening torque shown in table 7-3.
5. Mount the U-axis motor . (Refer to chapter 6.3 “Disassembly and
Reassembly of U-Axis Motor” .)
(When replacing the speed reducer, replace the input gear , too.)
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NOTE
For removing/applying of sealing bond and assembling after
applying sealing bond, refer to chapter 5.2 “Removing,
Applying, Assembling of Sealing Bond” .
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